Antibiotic / Antibiotic

Cephalexin

First-generation cephalosporin antibiotic used in prescription contexts for susceptible infections. Library focus includes beta-lactam allergy review, kidney-function context, GI effects, and infection-specific label verification.

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Educational reference only. This page does not diagnose, prescribe, or replace care from a licensed professional. Laws, availability, and clinical appropriateness vary by location.

Reference dosePrescription dosing depends on infection site, organism, kidney function, age/weight, and formulation. Verify official label and clinician directions.

Half-lifeShort; commonly around 1 hour in healthy adults, with exposure affected by kidney function. hours

Risk flagmoderate

Regulatory noteReview required

Side effects and watch-outs

Diarrhea
Nausea
Rash
Allergic reaction
Yeast overgrowth
C. difficile-associated diarrhea risk